111123222100 has 144 divisors (see below), whose sum is σ = 265012413120. Its totient is φ = 40109644800.

The previous prime is 111123222059. The next prime is 111123222149. The reversal of 111123222100 is 1222321111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134044486 + ... + 134045314.

It is an arithmetic number, because the mean of its divisors is an integer number (1840363980).

Almost surely, 2^111123222100 is an apocalyptic number.

111123222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111123222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132506206560).

111123222100 is an abundant number, since it is smaller than the sum of its proper divisors (153889191020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111123222100 is a wasteful number, since it uses less digits than its factorization.

111123222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111123222100 its reverse (1222321111), we get a palindrome (112345543211).

The spelling of 111123222100 in words is "one hundred eleven billion, one hundred twenty-three million, two hundred twenty-two thousand, one hundred".